Fix the line reference in config error message (#20743)

* Fix the line reference in config error message

* Fix platform config validation

* Fix test

* Handle error in error handling routine

homeassistant/config.py

@@ -446,7 +446,11 @@ def _format_config_error(ex: vol.Invalid, domain: str, config: Dict) -> str:
     else:
         message += '{}.'.format(humanize_error(config, ex))
 
-    domain_config = config.get(domain, config)
+    try:
+        domain_config = config.get(domain, config)
+    except AttributeError:
+        domain_config = config
+
     message += " (See {}, line {}). ".format(
         getattr(domain_config, '__config_file__', '?'),
         getattr(domain_config, '__line__', '?'))
@@ -759,7 +763,7 @@ def async_process_component_config(
                     p_validated = component.PLATFORM_SCHEMA(  # type: ignore
                         p_config)
             except vol.Invalid as ex:
-                async_log_exception(ex, domain, config, hass)
+                async_log_exception(ex, domain, p_config, hass)
                 continue
 
             # Not all platform components follow same pattern for platforms
@@ -779,10 +783,10 @@ def async_process_component_config(
                 # pylint: disable=no-member
                 try:
                     p_validated = platform.PLATFORM_SCHEMA(  # type: ignore
-                        p_validated)
+                        p_config)
                 except vol.Invalid as ex:
                     async_log_exception(ex, '{}.{}'.format(domain, p_name),
-                                        p_validated, hass)
+                                        p_config, hass)
                     continue
 
             platforms.append(p_validated)